Microscope stand



Dec. 27, 1932. M. BERGER I MICROSCOPE STAND Filed Nov. 25. 1930 PatentedDec. 27, 1932 UNITED STATES PATENT OFFICE mx BERGER, E JENA, GERMANY,assrenon 'ro THE Emu cam. mass, or JENA, enamm MICROSCOPE STANDapplication filed. November 25, 1930, Serial No. 497,978, and in GermanyDecember 4, 1929.

I have filed an application in Germany, December 4, 1929, of which thefollowing is a specification.

The great majority of microscopes are finely focused by a pinion headwhich is dis-. posed at the upper part of the stand at-the same heightas the tube. However,iuse is made also of another type of microscopes,which have their pinion head at the lower 13 part ofthe stand and,therefore, are completely different in construction not only as regardsthe focusing device but also asregards the stand.

The present invention applies to micro- 5 scopes that have a lowerpinion head and are s finely focused by means of the well-known deviceinwhich the tube is supportedby a lever that, being actuated by a gearing,for instance a toothed-wheel gearing, imparts it a slow motion, and aimsat providing this lever in the upper part of the stand, while thegearing is disposed in the lower part of the stand. Notwithstanding thefact that the pinion head for fine focusing is provided be- 13 low andthat for better convenience its axis is even made tocoincide with-thetilting axis of the microscope stand, this arrangement permits of givingthe stand its usual form again, which, compared with the construction01? the hitherto known microscopes of this type, not only provides aconsiderable economical-advantage but also allows of overcoming thedisadvantages regarding focus- 'ing accuracy inherent in the said kindof 3 microscopes. a

A' specially suitable device is obtained when the lever that is disposedin 'the upper .part of the stand and supports the tube is coupled by apush-rod to the gearing.

- The accompanying drawing shows a 'constructional example of the objectof the invention partially in a section and partially in elevation. I

The stand represented in the drawing consists of a base plate a on whicha hollow pillar bracket 1) is so mounted as toallow of being tilted onan. axis The pillar bracket 6 supports a tube a which, together with aslide 0 whereon it is coarsely adjustable by means of ahead 0, rests ona lever d onto which it is pressed byits own weight as .well

as by a spring e. In the lower part of the pillar bracket bis atoothed-wheel gearing which reduces the speed of the turning movementofa head 7 whose turning axis coin- 65 cides with the tilting axis A ofthe pillar b.

The toothed-wheel gearing consists, of a'pinion g which is fixed to theaxle of the head 7 and meshes with a toothed-wheel g and of a pinion gwhich is fast with the axle of the toothed wheel 9 and-meshes with teethh of a lever h. This lever-h turns about an axis B and is jointed at itsfree end to a push-rod z'which is connected also with the lever d.

As 'can be deduced from the foregoing, a

turning movenfent of the milled head 7' causes the tube'to be slowlyraised or lowered according to the direction in which the head 7 isturned.

I claim -1. On a microscope stand a carrier adapted to hold a microscopetube and being movably mounted on the stand, a lever mounted in the.upper part of the stand and acting 'on the carrier, a pinion headdisposed at the lower part of the stand, a gearing being situated in thelower part of the stand and coupled to the pinion head, and a push-rodconnecting this gearing with thesaid lever.

2. On a microscope stand a base,-a hollow pillar. bracket tiltablymounted on the base, a carrier adapted to hold a microscope tube andbeing movably mounted on the pillar bracket, a lever provided in theupper part of-the pillar bracket and acting on the car 35 rier, a pinionhead disposed at the lower part of the stand, a caring being situated inthe lower. part. of t e pillar bracket, the axis of the pinion headcoinciding with the tilting axis of the pillar bracket, a gearing beingdisposed in the lower part of the pillar bracket and-coupled to thepinion head, and a pushr'od connecting this gearing with the said lever.

MAX BERGER.

